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Tier 2
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Original research — experimental, observational, or case-control study. Direct primary evidence.
Marine & Wildlife
Remediation
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Occurrence and Seasonal Variation of Microplastics in the Effluent from Wastewater Treatment Plants in Qingdao, China
Journal of Marine Science and Engineering2022
54 citations
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Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count.
Score: 45
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0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Jinfeng Ding,
Jinfeng Ding,
Jinfeng Ding,
Jinfeng Ding,
Jinfeng Ding,
Jinfeng Ding,
Fenghua Jiang,
Jinfeng Ding,
Fenghua Jiang,
Fenghua Jiang,
Jinfeng Ding,
Jinfeng Ding,
Fenghua Jiang,
Fenghua Jiang,
Fenghua Jiang,
Chengjun Sun
Jinfeng Ding,
Chengjun Sun
Chengjun Sun
Jinfeng Ding,
Chengjun Sun
Chengjun Sun
Chengjun Sun
Fenghua Jiang,
Chengjun Sun
Jinfeng Ding,
Chengjun Sun
Fenghua Jiang,
Chengjun Sun
Fenghua Jiang,
Fenghua Jiang,
Menghui Wang,
Chengjun Sun
Jinfeng Ding,
Jinfeng Ding,
Chengjun Sun
Chengjun Sun
Chengjun Sun
Chengjun Sun
Chengjun Sun
Chengjun Sun
Jinfeng Ding,
Chengjun Sun
Fenghua Jiang,
Chengjun Sun
Chengjun Sun
Fenghua Jiang,
Chengjun Sun
Jinfeng Ding,
Fenghua Jiang,
Jinfeng Ding,
Fenghua Jiang,
Wei Cao,
Fenghua Jiang,
Wei Cao,
Fenghua Jiang,
Wei Cao,
Fenghua Jiang,
Wei Cao,
Fenghua Jiang,
Fenghua Jiang,
Fenghua Jiang,
Jinfeng Ding,
Jinfeng Ding,
Jinfeng Ding,
Jinfeng Ding,
Fenghua Jiang,
Fenghua Jiang,
Fenghua Jiang,
Fenghua Jiang,
Fenghua Jiang,
Fenghua Jiang,
Fenghua Jiang,
Chengjun Sun
Chengjun Sun
Chengjun Sun
Chengjun Sun
Chengjun Sun
Chengjun Sun
Menghui Wang,
Fenghua Jiang,
Fenghua Jiang,
Fenghua Jiang,
Fenghua Jiang,
Fenghua Jiang,
Fenghua Jiang,
Chengjun Sun
Jinfeng Ding,
Chengjun Sun
Fenghua Jiang,
Wei Cao,
Fenghua Jiang,
Wei Cao,
Chengjun Sun
Fenghua Jiang,
Fenghua Jiang,
Fenghua Jiang,
Chengjun Sun
Chengjun Sun
Chengjun Sun
Fenghua Jiang,
Chengjun Sun
Fenghua Jiang,
Fenghua Jiang,
Fenghua Jiang,
Wei Cao,
Chengjun Sun
Chengjun Sun
Fenghua Jiang,
Menghui Wang,
Fenghua Jiang,
Chengjun Sun
Fenghua Jiang,
Chengjun Sun
Fenghua Jiang,
Fenghua Jiang,
Chengjun Sun
Chengjun Sun
Fenghua Jiang,
Fenghua Jiang,
Chengjun Sun
Fenghua Jiang,
Chengjun Sun
Summary
Microplastic characteristics in effluents from five wastewater treatment plants in Qingdao, China were analyzed in winter and summer, finding fibers dominated by rayon and PET with average concentrations higher in winter, confirming WWTPs as a significant source of microplastics to the marine environment.
Wastewater treatment plants (WWTPs) are considered as one of the important sources of microplastics (MPs) in the marine environment. In this paper, the characteristics of MPs in the effluent discharged from five WWTPs in Qingdao, China, in winter and summer were analyzed. The results showed that only fibers and fragments were observed, with fibers as a dominant part. Rayon was the most domain polymer type, followed by Polyethylene terephthalate (PET) and chlorinated polyethylene (CPE). The average sizes of fiber MPs were 1010 ± 924 µm and 610 ± 691 µm in winter and summer, respectively. The contents of rayon were higher in summer than in winter. More small and transparent MPs were observed in summer. Rayon abundances ranged from 4.1 to 19.9 items/L and 33.3 to 116.7 items/L, with 12.3 ± 5.6 items/L and 67.6 ± 30.6 items/L as the average value in winter and in summer, respectively. The abundances of other polymer type MPs were 7.23~19.65 items/L with average value of 12.7 ± 4.7 items/L in winter and 12.0~20.0 items/L with 16.8 ± 4.7 items/L in summer. The daily emissions were estimated as 8.38 × 109~4.25 × 1010 items (9.2~27.8 kg) for rayon and 8.0 × 109~1.2 × 1010 items (7.6~5.3 kg) discharged for the other polymer type MPs from the five WWTPs. The results indicated that the seasonal variation of characteristics and emission of MPs in the effluent from WWTPs was mainly caused by increasing discharge of rayon, which may relate to people’s living habits and tourism activities.